Are you leaving gains on the gym floor? Most athletes think they’re resting 1–3 minutes between sets, but in reality, they’re cutting recovery short. Proper rest is crucial for muscle growth and the development of strength. More Strength equals more muscle, equalling better health.

Intrvl makes sure every second counts.
No accounts. No ads. Works offline—one-off payment.

Why athletes love Intrvl
Accurate timer engine — countdowns stay precise even if you pause, close the app, or get distracted

Background-safe — keep rests accurate while using other apps, no cloud required

Lock Screen & Dynamic Island — see your rest without unlocking your phone

Customisable alerts — sound, haptic, or flash so you never miss your next set

Set counter — track sets simply and stay on plan

Keep Screen On — the timer stays visible until you’re ready

Music-friendly — your playlist continues uninterrupted

Custom intervals — dial in rest to the second for your training plan

Backed by science
Research shows longer rest periods (2–3 minutes) deliver significantly better strength and hypertrophy results than short rests. Intrvl keeps you disciplined so you never sell your training short.

One app. One payment.
No subscriptions. No distractions. Just the interval timer designed for athletes serious about strength and growth.

Stop Under Resting. Start Gaining.